Hunter Mahan has climbed to the top of the leaderboard after the second round of the Canadian Open in Oakville, Ontario.
The American carded a bogey-free 64 at Glen Abbey Golf Club to carve open a two-shot advantage on John Merrick.
Bubba Watson went round in 67 and lurks four shots off the pace, while Patrick Reed and Aaron Baddeley are both on eight-under-par.
Overnight leader Brendan Steele struggled to a three-over 75, 10 shots more than he needed yesterday.
Luke Donald could only better yesterday's 73 by two shots, finishing just outside the one-under cut mark.
There was better news for Graeme McDowell, who signed for a 67 to finish on three-under-par. Charl Schwartzel (-1) will also be sticking around for the weekend.
